Dear Members, I work for a company that (among others) sells Ubuntu-based log storage appliances. I ran into a problem, where I'm trying to copy a large amount of data over to a CIFS mount from a Ubuntu 18.04 based appliance to a Windows 2012 R2 Storage Server, and rsync fails after 1-2-3 hours into the copy operation with something like: rsync: failed to set times on "FILENAME.U5EgGX": No such device (19)" and I see a number of kernel logs just prior to that, that look like this: kernel: [3819786.441711] CIFS VFS: No task to wake, unknown frame received! NumMids 1 kernel: [3819786.441717] 00000000: 6c000000 424d53fe 00000040 00000000 ...l.SMB@....... kernel: [3819786.441718] 00000010: 00000012 00000001 00000000 ffffffff ................ kernel: [3819786.441720] 00000020: ffffffff 00000000 00000000 00000000 ................ kernel: [3819786.441721] 00000030: 00000000 00000000 00000000 00000000 ................ kernel: [3819786.441722] 00000040: 00000000 I also tried to google around for a while, and I found the same exact package hexdump on the linux-cifs mailing list from 2012: https://www.spinics.net/lists/linux-cifs/msg06634.html In that thread the person reporting the problem failed to reproduce the problem a few weeks after reporting it. There it was recommended to try and mount the share with SMB v1, but that is out of the question nowdays. We tried forcing the mount to happen with vers=3 and 3.02, but it made no difference. The error still re-occurred. Best Regards, János Szigetvári -- Janos SZIGETVARI RHCE, License no. 150-053-692 LinkedIn: linkedin.com/in/janosszigetvari __@__˚V˚ Make the switch to open (source) applications, protocols, formats now: - windows -> Linux, iexplore -> Firefox, msoffice -> LibreOffice - msn -> jabber protocol (Pidgin, Google Talk) - mp3 -> ogg, wmv -> ogg, jpg -> png, doc/xls/ppt -> odt/ods/odp
